Hypothesis Testing, 95% Confidence, Point Estimate
Not what you're looking for?
1. Consider the following hypothesis test:
Ho:u1-u2 = 0
Ha:u1-u2 does not equal 0
The following results are for two independent samples taken from the two populations.
Sample 1
N1 = 80
x1 = 104
o1 = 8.4
Sample 2
N2 = 70
x2 = 106
o2 = 7.6
1. What is the value of the test statistic?
2. What is the p-value?
3. With a=.05, what is your conclusion, reject or accept?
2. A study of wage differentials between men and women shows that one of the reasons wages for men are higher than wages for women is that men tend to have more years of work experience than women. Assume the following results.
Men
n1=100
x1=14.9 years
o1=5.2 years
Women
n2=85
x2=10.3 years
o2=3.8 years
1. What is the point estimate of the difference between the two population means?
2. At 95% confidence, what is the margin of error?
3. What is the 95% confidence interval estimate of the difference between the two population means?
3. Consider the following data for 2 independent random samples taken from two normal populations.
Sample 1 - 10,7,13,7,9,8
Sample 2 - 8,7,8,4,6,9
Sample 1 mean = 9
Sample 2 mean = 7
1. Compute the 2 sample standard deviations.
2. What is the point estimate of the difference between the two population means?
3. What is the 90% confidence interval estimate of the difference between the two population means?
Purchase this Solution
Solution Summary
This solution calculates p-values, the value of test statistics, the point estimates, the margin of error, and standard deviations.
Purchase this Solution
Free BrainMass Quizzes
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.